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What happens when i. Hydrogen is bubbled through an aqueous solutionof sulphurdioxide . ii . Aqueousammonia in addeddropwiseto a solutionof coppersulphatetill it is in excess iii Tin intreated withconcentratednitric acid iv CrCI_(3) solutionis treatedwithsodiumhydroxide andthen withhydrogen peroxide v. Pb_(3)O_(4) is treated withnitric acid |
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Answer» Solution :Sulphate is precipitate `SO_(2) + 2H_(2)S rarr 3S + 2H_(2)O` ii. Ammonia gives deep bluecolourwith coppersulphide due to the formation of a complex `CaSO_(4) + 2NH_(4)OH rarr Cu(OH)_(2) + (NH_(4))_(2)SO_(4)` `Cu(OH)_(2) + 2NH_(4)OH +(NH_(4))_(2)SO_(4) rarr underset(blue)([CA(NH_(3))_(4)])SO_(4) + 4H_(2)O` iii. Metastamic acid ID formed `Sn + 3HNO_(3) (conc.) rarr H_(2)SnO_(3) + 4NO_(2) + H_(2)O` iv . A yellow solutionof sodiumchromate is PRODUCED `H_(2)O_(2) rarr H_(2)O + O` `2CrCI_(3) + 10NaOH + 3[O] rarr 2NaCrO_(4) + 6 NaCI + 3H_(2)O` Leaddioxide isprecipitate `Pb_(3)O_(4) +_ 4HNO_(3) rarr 2PB(NO_(3))_(2) 2H_(2)O + PbO_(2)` |
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